youtube-transcript-node/dist/formatters/index.js

This is a Node.js API which allows you to get the transcripts/subtitles for a given YouTube video. It also works for automatically generated subtitles and supports translating subtitles.

export class Formatter {
}
export class PrettyPrintFormatter extends Formatter {
    formatTranscript(transcript, kwargs) {
        return JSON.stringify(transcript.toRawData(), null, 2);
    }
    formatTranscripts(transcripts, kwargs) {
        return JSON.stringify(transcripts.map(t => t.toRawData()), null, 2);
    }
}
export class JSONFormatter extends Formatter {
    formatTranscript(transcript, kwargs) {
        return JSON.stringify(transcript.toRawData(), null, kwargs?.indent);
    }
    formatTranscripts(transcripts, kwargs) {
        return JSON.stringify(transcripts.map(t => t.toRawData()), null, kwargs?.indent);
    }
}
export class TextFormatter extends Formatter {
    formatTranscript(transcript, kwargs) {
        return transcript.snippets.map(snippet => snippet.text).join('\n');
    }
    formatTranscripts(transcripts, kwargs) {
        return transcripts.map(t => this.formatTranscript(t, kwargs)).join('\n\n\n');
    }
}
export class WebVTTFormatter extends Formatter {
    formatTranscript(transcript, kwargs) {
        const lines = ['WEBVTT\n'];
        for (const snippet of transcript.snippets) {
            const start = this._secondsToTime(snippet.start);
            const end = this._secondsToTime(snippet.start + snippet.duration);
            lines.push(`${start} --> ${end}`);
            lines.push(snippet.text);
            lines.push('');
        }
        return lines.join('\n');
    }
    formatTranscripts(transcripts, kwargs) {
        return transcripts.map(t => this.formatTranscript(t, kwargs)).join('\n\n');
    }
    _secondsToTime(totalSeconds) {
        const hours = Math.floor(totalSeconds / 3600);
        const minutes = Math.floor((totalSeconds % 3600) / 60);
        const seconds = totalSeconds % 60;
        const milliseconds = Math.round((seconds % 1) * 1000);
        return `${String(hours).padStart(2, '0')}:${String(minutes).padStart(2, '0')}:${String(Math.floor(seconds)).padStart(2, '0')}.${String(milliseconds).padStart(3, '0')}`;
    }
}